Prabha Solar DC Fan, A fan rotates much more slowly than an electric desk fan; it cools people effectively by introducing slow movement into the otherwise still, hot air of a room. Fans never actually cool air, unlike air-conditioning equipment, but use significantly less power (cooling air is thermodynamic ally expensive). Conversely, a ceiling fan can also be used to reduce the stratification of warm air in a room by forcing it down to affect both occupants' sensations and thermostat readings, thereby improving climate control energy efficiency. Overview :- Motor Type ?Strong Dc Motor 12 V Ratted Voltage ? 12v DC, Operating Voltage Range 9 -13 V Ratted Wattage - Ratted Wattage 10W HI-Low Speed Operate With 12V-7.5 Ah Battery/ 12V 18W/20W/24W Solar Panel / 14V-2Amp Power Adapter Max RPM ? 1450, Min Rpm ? 300 Oscillating- With Easy Control Knob Wide ?Angle Adjustable DC Pin With Wire And Clip Blade- Five Leaves Plastic Blade With Low Noise Strong Grill- 108/120 Spoke Grill Timer Function ? Electronic Timer 4 Pcs High Bright 5mm LED Stepless Speed, IC Controlled Electronic Circuit Switch For High /Low, ON/OFF, Light